ИСТИНА

Extreme hydrological events on the Russian rivers are closely related to climate change consequences. Such hydrological events are rare in occurrence but typically affect large areas, resulting in damage in several economic sectors. The last one was the disaster flood in Amur river basin in 2013. According to RosHydromet, number of dangerous hydrolometeorogical events doubled from 150-200 in the early 1990s to 350-450 by the end of 2000’s. During the last twenty years the role of the occasional floods in water regime became more and more significant. These events are closely connected with an atmospheric circulation in tropical as in the extra tropical latitudes. The main goal of this study is to investigate the long-response of the river runoff on the El Niño phenomenon and its variations according to the climate change. For this analysis the areas of temperature and precipitation response on these phenomena were highlighted. The joint analysis of the occurrence of extreme hydrological events and the El Niño and La Niña phenomenon was carried out. It was found that the remote response comes out mainly for the Far East region, spatially for Amur River basin, rivers of the Okhotsk Sea and the Kamchatka Peninsula. For the first time for Russian rivers relationship between anomalies of global and regional atmospheric circulation with sea surface temperature and extreme hydrological events was analyzed. The study was supported by the Russian foundation for basic research (project № 15-05-06693 А).